Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Stock-Based Compensation

Summary of restricted stock units activity

				Weighted-average
		Weighted-average		remaining contractual	Aggregate
	Number of options	exercise price per share		life (in years)	intrinsic value
Outstanding at December 31, 2023	2,774	$	19.62	7.9	$	26,941
Granted	1,179		22.74
Exercised	(104)		12.34
Forfeited/expired	(181)		20.24
Outstanding at March 31, 2024	3,668	$	20.80	8.3	$	17,741
Exercisable at March 31, 2024	1,297	$	22.24	6.6	$	7,615
Vested and expected to vest at March 31, 2024	3,668	$	20.80	8.3	$	17,741

Restricted Stock Units

Restricted stock unit (“RSU”) activity for the three months ended March 31, 2024 is presented below (in thousands, except per share amounts):

		Weighted-average
		grant date fair
	Number of shares	value per share
Unvested at December 31, 2023	1,328	$	17.87
Granted	446		24.40
Vested	(197)		17.57
Forfeited	(96)		20.52
Unvested at March 31, 2024	1,481	$	19.71

Summary of share-based compensation expense for all stock awards

Stock-based compensation expense was recorded in the following categories on the Consolidated Statements of Operations (in thousands):

	Three Months Ended March 31,
	2024		2023
Cost of product revenue	$	281	$	187
Cost of service and other revenue		308		350
Research and development		543		370
Selling, general and administrative		4,133		2,995
Total stock-based compensation expense	$	5,265	$	3,902